Combined top and truncated-cone radiating flue for oil stoves



Sept-30. 1924. 1,510,052

A. M. GOLDSTONE COMBINED TO? AND TRUNCATED CONE RADIA TING FLUE FOR OIL STOVBS Fil ed my 19, 1924 gnue'nfoz Patented Sept. 30, 1924.

UNITED STATES ABRAHAM M. GOLDS'IONE, OF BALTIMORE, MARYLAND.

COMBINED TOP AND TRUNCATED-CONE RADIATING FLUE FOR OIL STOVES.

Application filed May 19,

To all whom it may concern:

Be it known that I, ABRAHAM M. Gorins'ro vn, a citizen of the United States, residing at 1647 Appleton St, Baltimore city, in the State of Maryland, have invented certain new and useful Combined Tops and lruncated-Gone Radiating Flues for Oil Stoves, of which the following is a specification.

This invention relates to stoves, and

especially to an improvement in tops for oilstoves.

, One object of the invention is to provide a simple and very effective means to improve the draught of the oil-stove and thus prevent the accumulation therein oi the uuconsun'led products of combustion that causes unpleasant and unhealthful fumes to be emitted when the stove is in use.

Another object is to provide for increasing the heat radiation by providing a combined stove-top and chimney or flue of un usually thick metal (such as cast iron) which is possessed of good heat absorbing and heat-radiating qualities.

Another object is to provide an improved article of manufacture which is useful as a stove top (as. shown) and also useful as a heat-radiating accessory to be used in connection with the form of stoves known as Gas-plates or with gas-burners of different kinds. 7

Other objects and important features are pointed out or implied in the following details of description, in'connect-ion with'the accompanying drawings in which:

Fig. 1 is a central vertical sectional view through the upper part of an oil-stove which includes the present invention. Fig. 2 is a top plan view of the structure shown in Fig. 1, except that a part is broken away. Fig. 3 is a top plan view of the chimney or flue detached from the crown or top plate of the stove. Fig. 4C is a. fragmental view, in plan, of the central part of the top plate or crown.

Referring to these drawings in detail, in which similar reference characters correspond to similar parts throughout the several views: The upper end of a stove-cylinder is shown at 5, this being the ordinary form of cylinder used in oil burning heaters, having air vents 6 in its upper part.

At 7 is indicated one of the vertical rods which are combined with nuts for holding 1924. Serial No. 714,456.

the lower, upper and intermediate parts of the stove together, one of such nuts being indicated at 8, the same being formed with a bearing 9 that receives an end or pintle of the bail 10. Qnly a part of the bail is here shown, this feature being only incidental and of ordinary construction, and the same is true of the casing or cylinder 5 and the rod 7.

In lieu of the ordinary pressed sheet metal top or crown, I provide a relatively thick crown '11, preferably of cast iron, and the same is formed with. an annular shoulder 12 within and against which is seated the upper endoi the cylinder 5. This shoulder combines with the parts 7 and 8 for holding the parts 5 and. 11 in a fixed relation to one another. The crown is provided with a concentric circular opening 13, and around this is arranged a series of air outlets 14.

A trusto-conical or downwardly flared flue or chimney 15 is united with the crown 11 in any appropriate manner or by any appropriate means; the purpose of this chimney being to concentrate the draught so that the fluid of combustion will not touch the wall of the cylinder 5, nor the crown 11, thus eliminating the accumulation of such prodnets on the interior surface of the stove, 'e:-:- oept such that might accumulate temporarily on the interior surface of the chimney 15; and this is easily accessible through the open top of the chimney, so the accumula tion can be removed with ease and completeness by means of a brush or mop. However such accumulation will not take effect unless the wick is unevenly trimmed or allowed to burn while projecting too high above the burner; for, when burning normally, the products of combustion are held from the surface of the chimney by means of air which enters through the openings 6. The combined capacity of these openings is greater than that of the openings 1%; so, as the air is heated by the radiation of the chimney, such heated air passes out, not only through the outlets 14-, but also, through the space 16 around the lower edge or margin of the chimney, thus forming an air-lining of the fresh air which (being relatively cool and heavy) enters the inlets 6 to take place of the relatively hot and light air and products of combustion, as indicated by the curved arrows. The heat radiated and conducted trom the chimney to the crown also heats the latter which thick and of good conducting material) conducts the. heat to the outer rim of the crown and there radiates it in practically all directions. This construction and arrangement also give a much more uniform heat than the old. form of oil stove having a relatively light crown and no chimney.

In constructing the combined crown and chimney 11-15, it was found diflicult and impractical to cast the same integrally; and it was also found quite expensive and impract'ica'l to secure the parts 11 and 15 together with screw-threads; so, to overcome these difficulties and avoid machining of the (being relatively parts, 1 have devised the securing meanswhich will now be described: The margin of the opening 18 1s formed with notches 17 and arcuate depressions 18; and the chimney 15 is formed with an upstanding annulus 1 9 which extends up through the opening 13 and has radially extending lugs 20 adapted to pass through the notches 17 and be turned with the annulus so'as to rest on top of the depressed surfaces 18. These surfaces are slightly inclined upward from the notches 17, so that the lugs 20 co-operate therewith fordrawing the level seat 21 tight against the undersurface of the crown. For the purpose of locking the lugs against ret rograde movement on the surfaces 18, I provide holes 22 through the crown, and correspending holes .13 in the level surface 21 of the chimney; and into these holes I place rivets or screws and secure them in place by fireproof cement or other appropriate means. I may also fill the notches 17 and depressions 18 with fireprooi' cement (not shown), thus providing an even and level surface at the joint of the crown and chimney.

The main feature of the invention is the truncated cone-shaped fine or chimney 15, being the main radiating element of very heavy or thick cast iron which absorbs and radiates the heat from the heated air which passes through it.

It is not intended to limit this invention to the exact construction and arrangement here shown, but changes may be made within the scope of the inventive ideas and claimed.

\V'hat] claim as my invention is:

1.. A stove-top which includes a crown having a central opening therelln'ough and a downwardly and outwardly flared trusteconic-al chimney united with the crown and having its outlet through said opening, said crown being formed with a series of outlets around said central opening.

A. stove-top which includes a crown having an annularshoulder to fit around the hollow cylinder of an oil-stove. this crown having an opening concentric with the annular shoulder, and also having a series of openings around the concentric opening: and a frusto-conical chimney secured to said crown and having its outlet through said concentric opening.

3. The combination with a stove cylinder having a series ofopeniugs through its wall, of a crown having an annular shoulder receiving the upper end of the cylinder therein and thereagainst, and a chimney secured to the crown. and having its outlet through the center of said crown, the latter having a series of openings around said outlet and within said annular shoulder and cylinder, the lower end of said chimney being spaced from all parts of the stove and being at a lower level than said openings of the cylinder.

at. As a new article of manufacture, a stove top consisting of a circular crown and a chimney, said crown having a concentric circular opening provided with lateral notches and adjoining depressed surfaces, said chimney being frusto-conical and having an upwardly extending annulus to fit and rotate in said circular opening, the annulus being provided with radial lugs to pass through said notches and slide and finally rest on said depressed surfaces, the chimney being provided with an upwardly facing surface to slide on and finally restagainst said crown, and means to lock said lugs in position on said dc )ressed surfaces.

In testimony whereof I aiiix my signature.

as implied ABRAHAM M. GOLDSTONE. 

